Tool retainer



Nov. 24, 1931.V G. w. sMl'rH TOOL RTAINER Filed May 15, 1931 v d f to which itV is secured Patented Nov.'24," 19`31 Ail*AfUNITE GEORGE Wlsivrrrmlor rf'roor. `VImciusinlnan A Application ld May 15,

My invention relates tov rock drills, pavement breakers and the like and it particularly relates to the means for retaining the tool on the drill engine. f

Primarily, the invention has for an Aobject to provid-e a tool retainer of'a Vvery simple yet rugged construction, that may be easily Vmanipulated to secure or release the drill from the chuck.

Other objects will in part be obvious and part be pointed out hereinafter.- To the attainment Vof the aforesaid objects and ends, the invention still further resides in the novel details. of construction, combi-`. vnation and arrangement of parts, all of which will be irst fully described in thefol I f Of whichv th'ef cro lowing detailed description, then be particularly pointed out in the appended claims, reference being had to the acco ings, in which Figure l` is a side elevation of my tool retainer, the lower end of a drill engine being shown for purposes of illustrating manner of attaching the same.

Figure 2 is a vertical longitudinal section of the tool chuck and retainer taken on 'the' line 2 2 of Figure l, the drill being shown in its raised position. a.

Figure 3 is a detail vertical section' of the lower end of the chuck taining device in its drill releasing position. Figure 4 is a horizontal section taken,v on the line 4 4 of Figure 3. In the drawings in which like numerals figures, l represents the drill and 2 the chuck thereof. The chuck has ears 3 to connect with similar ears4 on the drilling engine by suitable cushion bolts 5. 6 represents the socket for the shank of the drill steel and 7 represents the counterbore in which the collar of the drill steel is adapted to lie.'

The chuck has a transverse enlargement 8 provided with a transverse bore 9 for the locking bolt 10, the collar bore recess 7 l n l The locking bolt is longer than the enlarge ment and has an end projecting to carry a milled head 11 and a coil spring 1-3 for tendbore 9- intersecting the panying drawshowing the tool Y re- 1931.* serial' no. 537,678.1.

ing` to the. locking bolt continuous Vin i D; VSTAT TL j i orruinwgojylgnssienon y Ow'fvrremwee one direction.A The looking bolt has an an?,

nular.concave groove p 12 which, i when. fthe'V bolt is in one positionrenables the eollar`19` ofj thej drill jsteel Vto clear thef bolt.forthehsA purpose of removing the tool from the chuck, l

but when the bolt is. in another position the? y y begout of alignment with theL- c ollarjl9 andth boltllO- will thusjock the drill lwithin .the chuck,A itl being understood thatfthe-depthofthe .bore-7 Vissuehthat i I drill steel- 17 may .nioveislightly`in` a .v l

tudinaldretom f l i j f'lfhe; enlargement- 8 at'theilend oppositethe Y heil@ EOfh bolt; is provided with af shallow groove `l5 and deepgroove 16,in either one;

s sfpin 14 that is carried 'f the bolt l0 may: liel the tension of vthef is pushedfin p and 'turned to- Abring the pi'nf14v in the shallow groove. 1 5, in the embodimenfty and beheld by virtus Off-- 1 prinsl. -Whenthe bolt.V

of the invention illustrated,theannular Coniy s "cave groovel2 will be' out of alignment with the collar l9fand theloolt lOfwill hold the toolin place. Toreleasethe tool one simply pushes against `the head clear the pinf14 from the thefbolt awhalf turn, thus enabling they pin- `14 to enter. the deep groove 16 4'and allow 'the :spring 13' to'move the bolt l() `tothe positionE where: the "grofove l2V will align -ivith theQcollar land'thus free. the toolJ frointhe chuek." i

section` so that its shank?1s, wheainjhee, rsocket 1,6,.will prevenfrtation Qtthelllljillv en ,its axis. .,f FromftheL foregoing description, taken il' Infthe embodimentlof*the"inventionillus- Y trate d,.thej-drill:steelis heXagonalinlcrossy 11 of reference indicate like parts in all of. the

connection `withzthe accompanyingdr'awings, Y

it isthought thecomplete onstrue'tiomoper ation and advantagesof in'yinyentiong will be"l clearto those Skilled in thejart to ithich, it relates. f j `j Whatlfclaimiszfj 1 T1. In drill retainers,` achukhaving alon-l gitudinal Vhole for the drill steel shank and." A`

having a counterboreffor receiving ftheA drill steelV collar, said chuck 4 having l a 'transverse V Y v enlargement with' a ycross,` bore` intersectingai@ @paarweise bore; andraflaa-ief a 'head oni one end, means `groove'intersectirig said -crossybore, a'

K .bolt to*liefineitherfo:said-'grooves,to holdf v to rnyovewssaidboltf in onefdirection, I K

shallow groove vand an f deepl 'groove-'intersectingosaid crossbore, a'-

t'ransverse enlargementsV bore and having a K continuously tendingr to move said bolt in one direction, said enlargement having'a shallow groveand a deep "bolt holding pin projectingrom one side of-said said bolt inYV one 'position or anotherxzs'aid to clear the V2. 'In drill retainers, gitudinaliholefor the ,drill steel shank andv havingjaconnterbore for receiving the drill' steel collar',V said chuck having-'a transverse enlargement with a cross bore intersecting; 'Y'

l.saidcollar receivirigbore,y and a latch bolt in said transverse nenlargenients 'bore,' said lbolt'projecting'beyond 'fthe limits ofsaidvl Y transverse' enlargerneritgs"bore-*and having a2 headvon oneV ef d,cmeans continuouslytending large-merit ,hel-ving a bolthollding pinlproj ecting romone side 4 of` sai-d boltfto lie iny eitherjof said'r; groovesfto hQldfsai'd bolt in one ia-earth@ when saidY :p11:

Y drillste'el collar to clear-fthe bol-t..

` tjeel Collar,

Vthe vsteel shank* and aving a 'counterbore' `for lreceiving thedrill Y enlargement` Witha crossl .bore'ijnterseating;l

' belt Y, head on o in said` Vtransverse enl g bolt 'projecting ,beyond the ljmtsffot Said;

transverse'.enlargements bore and havlnga head on one end,fn1eans continuously tending"y to' 'move said bolt infone -direction;said'enlar-gement `having a shallow :groove and' a;

deep-groove-ntersectingl said;erossfbore',v a u, g Y vbolt'hldrlgpin projecting from 'onesid'e f E vspring on said eri- 1 y y* positionjor another, said;

bolt having' a concaved'-annnlarpgroove so lo g, f'

is'r in said deep groove said .annular groove Will -perrnit I` the p v t 3:" drill retainers,r a chck having a lon o-said bolt to lie in either of saidgrooves toV hold said bolt in one position or'ianother,

" 2x11 1L-f 'Y a y in said transverse' enlargements bore,- saidVv largement. having a shallow'grove andaVVK i bolt V)projecting beyondjthe limits of, said deep .groove intersecting said cross bore, a

,boltl holding pin'projecting ro'mfo'ne side 'zo c said holt having laL 'concavedannularggroove n solocated thatvv'hen groove-said annular groove yvvill'pernnit the dril-lfsteel l tending me a'nsr carino'risingV a Ycoil enlargement.r

said pin -isggin said deepV collar` .to Yclear vthe bolt," Said vAeon-Av.

tlieblt between said head and saidV l GEORGE W; SMITH, f

ysaid chuck 'having a 'transverse of'saidgboltjto lie inreither ioffsaid grooves i tolho'ld s aid'boltiin vone vp'ositi'onor another,A 'l "said bolt having an annular grooveto clear f the drill' steel'colla'r when said' boltV is in `one. of its said-positions, said continuouslyl tendcoil 'springon the 41., In drill-retainers, a chuckhaving along A the` dril'l'steel V'shank and f avi'ng a' counter borev vfor. receiving the drill steel collaig said chuck havinga transverse enlargement' with, c a 'crossigfbore `i1''iter'secting .Y said collar receiving bore,

y y i and @intenten In saidftransverse enlaiggenients` bore, said :projecting beyond;` the limite :Zoff said A v bQrevandhavng-a neend,.means centouslyatendngl tra'Y verse en largernents Y ll() 

